雷聲大,雨點小 [ㄌㄟˊ ㄕㄥ ㄉㄚˋ , ㄩˇ ㄉㄧㄢˇ ㄒㄧㄠˇ; lei2 sheng1 da4 , yu3 dian3 xiao3] loud thunder, but only tiny drops of rain (idiom); a lot of talk, but no action action speaks louder than words his bite is worse than his bark ◄ ►